* Adjective: This is the most common usage, meaning "high in elevation, noble, or grand." For example: "The eagle soared to lofty heights."
* Noun: It can be used as a noun, referring to something high or elevated, often in a metaphorical sense. For example: "The poet reached new lofties in his latest work."
* Adverb: While less common, it can be used as an adverb to describe the manner of something being high. For example: "The mountains rise loftily above the valley."
So, the part of speech for "lofty" depends on its role in the sentence.